Mevlâna's successor Hüsamettin Çelebi decided to build a mausoleum (Kubbe-i-Hadra) over his grave of his master. The Seljuk construction, under architect Behrettin Tebrizli, was finished in 1274. Gürcü Hatun, the wife of the Seljuk Emir Suleyman Pervane, and Emir Alameddin Kayser funded the construction. The cylindrical drum of the dome originally rested on four pillars. The conical dome is covered with turquoise faience.

However several sections were added until 1854. Selimoğlu Abdülvahit decorated the interior and performed the woodcarving of the catafalques.

The decree of 6 April 1926 confirmed that the mausoleum and the dervish lodge (Dergah) were to be turned into a museum. The museum opened on 2 March 1927. In 1954 it was renamed as "Mevlâna Museum".

Source: https://en.wikipedia.org/wiki/Mevlana_Museum